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Finding the Fourth Proportional to 72,446.20, 108,539.70 and 62,078.20

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Solution

The fourth proportional to 72,446.20, 108,539.70 and 62,078.20 is: 93,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,446.20 : 108,539.70 = 62,078.20 : x
  2. Step 2: Convert to fraction form
    72,446.20/108,539.70 = 62,078.20/x
  3. Step 3: Cross multiply
    72,446.20x = 108,539.70 × 62,078.20
  4. Step 4: Simplify right side
    72,446.20x = 6,737,949,204.54
  5. Step 5: Solve for x
    x = 6,737,949,204.54/72,446.20
  6. Step 6: Final answer
    x = 93,006.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.